Has basic civism completely disappeared?

So today I'm back to ranting because of something that happened to me earlier. I'm in a elevator heading down from the 4th floor to the basement of the building I was in, since it is faster to get to my office from the basement. We hit the lobby, and of course people that don't pay attention head towards the elevator even though it's heading down. I typically let them know ahead of time "it's heading down" so they don't need to come in (delaying the process of the elevator going down, letting us leave and the go back up). So this idiot comes in saying "well, it will go back up", turns around and sees his buddy coming towards the elevator (even though he knows they're both going up, unlike the elevator). So what does he do? OF COURSE he decides to hold the elevator so his buddy can come in (further delaying me being able to reach my floor). Then another buddy of these 2 show up as the doors are closing so OF COURSE he decides to block the door again to let his other buddy get on it. Then ANOTHER buddy shows up and as he gets ready to block the door AGAIN I snapped asking him "could you fucking let the door close so I can reach the fucking basement!?". So he did, and I reached my floor a good time after I should have. Messed up part is that, had they not entered the elevator, we would have been out of it, and they could have all gone in as the elevator was heading the right direction, wasting less time for ALL of us, not to mention the people at other floors that were probably waiting for this ONE single elevator.

Unfortunately, this is a scene that happens way too often, with people being so concentrated in what THEY want, that they fail to pay attention to what makes sense. It is just like the typical scenario: "room full of people trying to get out, while a lot of people want to get in". In "common sense civic World", where I happen to reside, you WAIT until a room is empty before you walk in, thus avoiding a jam of people at the door, while allowing the room to have enough empty space to accommodate the new wave of people heading in. It is the most BASIC, LOGICAL approach. Yet, every day, in colleges, coffee shops, buses, trains, etc etc, people will just walk into a full room while people attempt to head out without even flinching. I just don't get it.

In a nutshell, be courteous to each other, if we could all be nicer to one another, maybe we wouldn't be in a World like the one we're in today. It's just common sense.

PS: And if you are one of those selfish $^&*)%*(&# then SHAME ON YOU!